Kai Zheng created HDFS-8136:
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Summary: Client gets and uses EC schema when reads and writes a
stripping file
Key: HDFS-8136
URL: https://issues.apache.org/jira/browse/HDFS-8136
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: HDFS-7285
Reporter: Kai Zheng
Assignee: Kai Zheng
Discussed with [~umamaheswararao] and [~vinayrpet], in client when reading and
writing a stripping file, it can invoke a separate call to NameNode to request
the EC schema associated with the EC zone where the file is in. Then the schema
can be used to guide the reading and writing. Currently it uses hard-coded
values.
Optionally, as an optimization consideration, client may cache schema info per
file or per zone or per schema name. We could add schema name in
{{HdfsFileStatus}} for that.
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